An Alternative Treatment for Anxiety: A Systematic Review of Human Trial Results Reported for the Ayurvedic Herb Ashwagandha (Withania somnifera)
Key Finding
Ashwagandha consistently and significantly reduced anxiety in all reviewed human trials across various populations.
Plain-English Summary
This systematic review analyzed five human trials investigating ashwagandha for anxiety, including both clinical anxiety disorders and subclinical anxiety. Studies used doses ranging from 300-600mg twice daily over 6-12 weeks.
All five studies reported significant improvements in anxiety scores with ashwagandha compared to placebo or baseline. The herb was effective for both clinical anxiety disorders and stress-related anxiety. Improvements were observed on validated scales including the Hamilton Anxiety Rating Scale and Beck Anxiety Inventory.
Ashwagandha also demonstrated benefits for depression, stress, and overall quality of life in the reviewed studies. The herb's anxiolytic effects appear to work through modulation of the stress response, including cortisol reduction, GABA enhancement, and neuroprotective mechanisms. Ashwagandha is considered an adaptogen, helping the body maintain balance during stress. The supplement showed excellent tolerability across all studies with minimal adverse effects.